Hinge



(No Model.) 7 Y E. R. BUHRMAN.

HINGE.

Patented Oct. 3,1893.

UNITED STATES PATENT OFFICE.

EDWARD R. BUHRMAN, OF CINCINNATI, OHIO.

HINGE.

SPECIFICATION forming part of 'Letters Patent No. 506,154, dated October 3, 1893.

Application filed June 26, 1893.

To all whom it may concern.-

Be it known that I, EDWARD R. BUI-IRMAN, a citizen of the- United States, residing at Cincinnati, Ohio, have invented new and useful Improvements in Hinges, of which the following is a specification.

My invention relates to the class of hinges that may be termed three-part hinges, such as used in connection with folding furniture. or in like situations, where,as for example, in folding lounges,-the hinged parts are to fold together and be maintained a sufficient distance apart to accommodate the cushions, &c., and swing outward a limited distance as permitted and limited by stops upon the hinges.

The object of my invention is to produce a hinge of this character, possessing great strength and durability, and holding power, adapted to be secured to the hinged parts at points in a line across the grain of the wood, and atthe same time, admit of economical manufacture in a manner and of material giving the maximum strength with minimum weight.

To these ends, my improved hinge consists of two plates, preferably of sheet steel, with projections at opposite sides of the plate at right angles to its face, to form stops, and a connecting bar pivoted to the plates between the stops, and uniting the same into a hinge. I may also provide projections to be bent at right angles to the opposite or rear face of the plates to be sunk into the wood in attaching the plates to aid their holding power and relieve the stress upon the retaining screws.

My invention is illustrated in the accompanying drawings, in which- Figure 1, is a perspective view of my improved hinge complete. Fig. 2, is a partial end-elevation of afolding lounge showing the position of the hinge applied thereto, in full lines, with the lounge extended outward; and in dotted lines, the two successive positions of the hinge in folding inward. Fig. 3, is a view of the blank first formed in constructing the hinge-plates; and Fig.4, detail sections on the lines, a, and, y, of Fig. 3.

Referring now to the drawings: my improved hinge, shown in full perspective in Fig. 1, consists of two plates, A and A, to be attached to opposite folding members of a Serial No. 473,859. (No model.)

lounge or similar object, pivotally connected by a bar, B. As constructed in preferred form, the plates are hexagonal in form,with opposite sides parallel; having projections,a, turned up at the opposite longer sides, between which, in the angle of the pointed end of each plate, the connecting bar, B, is pivoted at 1). One of theshorter sides at the end of each plate opposite the pivoted connection, b, is turned down as at a; and one of the shorter sides opposite that last mentioned, and adjacent to the pivotal connection, as at a, may be also turned down in like manner. These project at the rear of the plates and form lugs, which are let into the wood and assist in holding the plates against the twisting stresses of use, thereby relieving the holding screws by which the plates are secured.

In constructing the hinge,all parts of which are preferably made of rolled steel,- a blank, A, is cut out of sheet metal of the form indicated in Fig. 3. By suitable dies, the blank is cut out and the holes punched at one operation, and the shallow cuts made at opposite sides to allow turning up the flaps, a, constituting the ultimate stops of the pivotal bar, B. The connection bar, B, may in like manner, he cut out of sheet metal or severed from a fiat bar. The parts are so proportioned, and the stops, 0,, so arranged, that each plate has a quarter revolution in its pivotal relation to the bar; so that the hinge as a Whole, admits of half a revolution of the parts connected; but for special uses these capacities may be varied as desired.

Both hinge plates are made from similarly cut blanks-the stops or ledges being, however, bent oppositely in respect to the faces of the blank to form opposite plates for the pivotal bar. The bar, B, is projected beyond its pivots, b, at both ends, and terminated by V-shaped points-the respective sides I of which engage against the stops, a, when the hinge is folded in either direction. The twisting stress brought to bear against the plates is thus practically at right angles to the face of the stops, (1., (and a which, being sunk in the wood afford long resisting bearings of great strength, relieving the screws and affording a secure hold upon the wood.

The form and arrangements of parts facilitate and cheapen the expense of manufacture from sheet metal which is much stronger for the purpose than cast metal; but the hinge may be made of cast metal if preferred. Its form also adapts it to use either as a right hand or left hand attachment.

The manner of attachment,and mode of operation, are indicated in Fig. 2, where the hinge is shown attached to two members, L, L of a folding lounge; and the successive positions of the folding member, L indicated by dotted lines. In first lifting the folding member, L it turns upon the outer pivot, b, of the hinge to a vertical position, as shown in dotted lines. In this position the bar, B, still remains horizontal, but is now engaged against the opposite stop, a, to that engaging its outer end in the first instance. Then by a push to the rear at the top of the part, L the bar, B, retains its fixed relation to the part, L and the whole turns upon the rear pivot, 1), into the second or closed position shown in dot-ted lines.

Be it observed that each hinge plate is disposed diagonally across the grain of the wood, so that the fastening screws, S,are inserted in independent separated portions of the Wood fiber; also, that the stops a lie with the grain and may be forced in by hammer or placed in grooves which may be provided 0 therefor; thus giving great strength and durability to the hinge.

I claim as my invention and desire to secure by Letters Patent of the United States 1. The improved hinge embodying in com- 35 bination a pair of flat plates each having stop ledges projecting above its face at opposite sides of its pivotal connection, and a connection bar pivoted to the plates and projecting beyond its pivots at each end to engage 40 the stop ledges at its ends substantially as set forth. 2. The improved hinge embodying in combination two flat plates having opposite stopledges, a, and one or more holdinglugs, as a, 5

witnesses.

EDWARD R. BUHRMAN. Witnesses:

L. M. HOSEA, LANDON FREYBLER. 

